/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.grails.gsp.jsp

import groovy.transform.CompileStatic
import groovy.transform.TypeCheckingMode

import org.grails.io.support.SpringIOUtils

/**
 * reads the tag library definitions from a web.xml file
 *
 * @author Graeme Rocher
 */
@CompileStatic
class WebXmlTagLibraryReader {

    /**
     * Contains a map of URI to tag library locations once the handler has read the web.xml file
     */
    Map<String, String> tagLocations = [:]

    WebXmlTagLibraryReader(InputStream inputStream) {
        inputStream.withStream {
            init(new BufferedInputStream(inputStream))
        }
    }

    @CompileStatic(TypeCheckingMode.SKIP)
    private init(InputStream inputStream) {
        def rootNode = SpringIOUtils.createXmlSlurper().parse(inputStream)
        rootNode.taglib.each { taglib ->
            String uri = taglib.'taglib-uri'.text()
            String location =  taglib.'taglib-location'.text()
            tagLocations[uri] = location
        }
    }
}
